The flap door consists of valve seat (valve body), valve plate, sealing ring and hinge. Circular and square water outlets are only used for one-way flow. They are compact in structure and reliable in operation. The opening and closing force comes from the water source pressure. When the water pressure inside the flap door is greater than the pressure outside the flap door, it will open; otherwise, it will be closed.
Applicable media: water, river water, river water, sea water, domestic and industrial sewage
Scope of application: suitable for water conservancy system, municipal sewage, urban flood control and drainage, sewage treatment plant, water plant, etc.